That is a very rare and amazing find. You are lucky to have found it. Post it in the North American Indian Artifacts forum. Everyone would love to see it.
My sister and mother had both their hips replaced. Mom did fine & lived to be 90. My sister is going gang busters at 72. I had a knee replacement 4 years ago & everything is fine. No issues other than kneeling is a little painful but I don't do that. I think you'll be fine. Sir Edmund Hillary...